681027570556 has 24 divisors (see below), whose sum is σ = 1244954380320. Its totient is φ = 325358195712.

The previous prime is 681027570529. The next prime is 681027570557. The reversal of 681027570556 is 655075720186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681027570557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3898641 + ... + 4069576.

It is an arithmetic number, because the mean of its divisors is an integer number (51873099180).

Almost surely, 2^681027570556 is an apocalyptic number.

It is an amenable number.

681027570556 is a deficient number, since it is larger than the sum of its proper divisors (563926809764).

681027570556 is a wasteful number, since it uses less digits than its factorization.

681027570556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7969173 (or 7969171 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 681027570556 in words is "six hundred eighty-one billion, twenty-seven million, five hundred seventy thousand, five hundred fifty-six".